Accessory Description and Usage (Listed Alphabetically) - CONTINUED

25HCS3C

11. MotorMasterr Low-Ambient Controller

Afan-speed control device activated by a temperature sensor, designed to control condenser fan motor speed in response to the saturated, condensing temperature during operation in cooling mode only. For outdoor temperatures down to -20_F (-28.9_C), it maintains condensing temperature at 100_F ±10_F (37.8_C ± 5.5_C).

Usage Guideline:

A MotorMasterr Low Ambient Controller or Low-Ambient Pressure Switch must be used when cooling operation is used at outdoor temperatures below 55_F (12.8_C).

Suggested for all commercial applications.

12. Outdoor Air Temperature Sensor

Designed for use with Carrier Thermostats listed in this publication. This device enables the thermostat to display the outdoor temperature. This device also is required to enable special thermostat features such as auxiliary heat lock out.

Usage Guideline:

Suggested for all Carrier thermostats listed in this publication.

13. Outdoor Thermostat

An SPDT temperature-actuated switch which turns on supplemental electric heaters when outdoor air temperature drops below a user-selected set point.

Usage Guideline:

Electric supplemental heat applications in non-variable speed indoor units when electric heat staging is desired.

Usage Guideline:

Some local codes may require limiting the heating head pressure in the vapor line in some applications.

14. Secondary Outdoor Thermostat

An SPDT temperature-actuated switch which turns on third-stage of supplemental electric heaters when outdoor air temperature drops below the second-stage set point.

Usage Guideline:

Outdoor thermostat applications where electric heater is capable of 3-stage operation.

15. Snow Stand

Coated wire rack which supports unit 18 in. (457.2 mm) above mounting pad to allow for drainage from unit base.

Usage Guideline:

Suggested in the following applications:

Heat pump installations in heavy snowfall areas. Heat pump installations in snow drift locations.

Heat pump installations in areas of prolonged subfreezing temperatures.

All commercial installations.

16. Sound Hood

Wraparound sound reducing cover for the compressor. Reduces the sound level up to 2 dBA.

Usage Guideline:

Suggested when unit is installed closer than 15 ft (4.57 m) to quiet areas, bedrooms, etc.

Suggested when unit is installed between two houses less than 10 ft (3.05 m) apart.

Usage Guideline:

Suggested in the following applications:

Heat pump installations in heavy snowfall areas. Heat pump installations in snowdrift locations.

Heat pump installations in areas of prolonged subfreezing temperatures.

All commercial installations.

17. Thermostatic Expansion Valve (TXV) Bi-Flow

Amodulating flow-control valve which meters refrigerant liquid flow rate into the evaporator in response to the superheat of the refrigerant gas leaving the evaporator.

Usage Guideline:

Required in all heat pump applications

18. Time-Delay Relay

An SPST delay relay which briefly continues operation of indoor blower motor to provide additional cooling after the compressor cycles off.

Note: Most indoor unit controls include this feature. For those that do not, use the guideline below.

Usage Guideline:

Accessory required to meet ARI rating, where indoor not equipped.

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Carrier 25HCS3C warranty MotorMasterr Low-Ambient Controller
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25HCS3C specifications

The Carrier 25HCS3C is a cutting-edge air conditioning unit designed for residential spaces, delivering optimal cooling and heating performance while prioritizing energy efficiency and comfort. This model stands out for its robust design, advanced features, and reliable functionality, making it a popular choice among homeowners.

At the core of the Carrier 25HCS3C is its energy-efficient compressor, which utilizes advanced variable-speed technology. This feature allows the unit to adjust its cooling output based on the specific needs of a space, ensuring that energy is not wasted. By providing consistent temperature control, the compressor helps reduce energy consumption, ultimately saving homeowners on utility bills.

One of the defining characteristics of the Carrier 25HCS3C is its Quiet Performance technology, which operates at lower noise levels compared to traditional units. With sound levels as low as 53 dBA, the 25HCS3C creates a peaceful indoor environment, making it suitable for bedrooms and other quiet spaces. This is achieved through sound-dampening insulation and a specially designed fan system that minimizes operational noise.

The Carrier 25HCS3C also incorporates advanced filtration systems, enhancing indoor air quality. Its high-efficiency air filter captures dust, allergens, and other airborne particles, ensuring that the air circulated in the home is clean and fresh. For homeowners with specific air quality concerns, optional UV light kits can be added to eliminate bacteria and mold, further enhancing overall health indoors.

A user-friendly digital thermostat allows for precise temperature control and scheduling, making it easy to tailor the cooling or heating settings to individual preferences. The unit is also compatible with smart home systems, enabling remote management through mobile devices. This connectivity is increasingly valuable in today’s smart homes, providing convenience and ease of use.

Additionally, the Carrier 25HCS3C is designed with durability in mind. Its weather-resistant cabinet and corrosion-resistant outdoor coil ensure longevity and consistent performance in various climates. Moreover, the unit is backed by Carrier's reputation for quality and reliability, making it a trustworthy investment for homeowners seeking efficient comfort solutions.

In summary, the Carrier 25HCS3C combines energy efficiency, quiet operation, enhanced air filtration, and smart technology, making it an exceptional choice in the air conditioning market. Its commitment to comfort and performance ensures that it meets the needs of modern households.
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